BUG#27779 (Slave cannot read old rows log events):

Taking code from before BUG#22583 and incorporating as events to be able
to read old events. Also incorporating old pack and unpack functions
into patch.


client/Makefile.am:
  Adding files log_event_old.{h,cc} and rpl_record_old.{h,cc}
client/mysqlbinlog.cc:
  Adding log_event_old.cc.
libmysqld/Makefile.am:
  Adding files log_event_old.{h,cc} and rpl_record_old.{h,cc}
sql/CMakeLists.txt:
  Adding files log_event_old.{h,cc} and rpl_record_old.{h,cc}
sql/Makefile.am:
  Adding files log_event_old.{h,cc} and rpl_record_old.{h,cc}
sql/log_event.cc:
  Adding code to read pre-GA rows events.
sql/log_event.h:
  Refactoring to support inheritance and including "old" events definitions.
sql/log_event_old.cc:
  New BitKeeper file ``sql/log_event_old.cc''
sql/log_event_old.h:
  New BitKeeper file ``sql/log_event_old.h''
sql/rpl_record_old.cc:
  New BitKeeper file ``sql/rpl_record_old.cc''
sql/rpl_record_old.h:
  New BitKeeper file ``sql/rpl_record_old.h''

1 files changed, 98 insertions, 0 deletions

diff --git a/sql/log_event_old.cc b/sql/log_event_old.cc
new file mode 100644
index 00000000000..1172a3e0ad4
--- /dev/null
+++ b/sql/log_event_old.cc
@@ -0,0 +1,98 @@
+
+#include "mysql_priv.h"
+#include "log_event_old.h"
+#include "rpl_record_old.h"
+
+#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
+int
+Write_rows_log_event_old::do_prepare_row(THD *thd, RELAY_LOG_INFO *rli,
+                                         TABLE *table,
+                                         char const *row_start,
+                                         char const **row_end)
+{
+  DBUG_ASSERT(table != NULL);
+  DBUG_ASSERT(row_start && row_end);
+
+  int error;
+  error= unpack_row_old(rli, table, m_width, table->record[0],
+                        row_start, &m_cols, row_end, &m_master_reclength,
+                        table->write_set, PRE_GA_WRITE_ROWS_EVENT);
+  bitmap_copy(table->read_set, table->write_set);
+  return error;
+}
+
+
+int
+Delete_rows_log_event_old::do_prepare_row(THD *thd, RELAY_LOG_INFO *rli,
+                                          TABLE *table,
+                                          char const *row_start,
+                                          char const **row_end)
+{
+  int error;
+  DBUG_ASSERT(row_start && row_end);
+  /*
+    This assertion actually checks that there is at least as many
+    columns on the slave as on the master.
+  */
+  DBUG_ASSERT(table->s->fields >= m_width);
+
+  error= unpack_row_old(rli, table, m_width, table->record[0],
+                        row_start, &m_cols, row_end, &m_master_reclength,
+                        table->read_set, PRE_GA_DELETE_ROWS_EVENT);
+  /*
+    If we will access rows using the random access method, m_key will
+    be set to NULL, so we do not need to make a key copy in that case.
+   */
+  if (m_key)
+  {
+    KEY *const key_info= table->key_info;
+
+    key_copy(m_key, table->record[0], key_info, 0);
+  }
+
+  return error;
+}
+
+
+int Update_rows_log_event_old::do_prepare_row(THD *thd, RELAY_LOG_INFO *rli,
+                                              TABLE *table,
+                                              char const *row_start,
+                                              char const **row_end)
+{
+  int error;
+  DBUG_ASSERT(row_start && row_end);
+  /*
+    This assertion actually checks that there is at least as many
+    columns on the slave as on the master.
+  */
+  DBUG_ASSERT(table->s->fields >= m_width);
+
+  /* record[0] is the before image for the update */
+  error= unpack_row_old(rli, table, m_width, table->record[0],
+                        row_start, &m_cols, row_end, &m_master_reclength,
+                        table->read_set, PRE_GA_UPDATE_ROWS_EVENT);
+  row_start = *row_end;
+  /* m_after_image is the after image for the update */
+  error= unpack_row_old(rli, table, m_width, m_after_image,
+                        row_start, &m_cols, row_end, &m_master_reclength,
+                        table->write_set, PRE_GA_UPDATE_ROWS_EVENT);
+
+  DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
+  DBUG_DUMP("m_after_image", m_after_image, table->s->reclength);
+
+
+  /*
+    If we will access rows using the random access method, m_key will
+    be set to NULL, so we do not need to make a key copy in that case.
+   */
+  if (m_key)
+  {
+    KEY *const key_info= table->key_info;
+
+    key_copy(m_key, table->record[0], key_info, 0);
+  }
+
+  return error;
+}
+
+#endif